This section delves into environmental pollution, outlining its main types: air pollution, water pollution, land pollution, and noise pollution. Each type is described with respect to its sources, the resulting pollutants, and their harmful effects. Water pollution, in particular, is illustrated by examining sources such as industrial effluents and urban runoff, which contribute to the degradation of water quality, rendering it unsafe. The discussion also includes urban waste management issues and the need for effective measures to enhance environmental health. Exercises at the end aim to test students' knowledge and reinforce learning outcomes by challenging them with various types of questions.